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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 755 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  2. 2.The price of a school bag changes from ₹3400 to ₹2550. By what percent did it come down?
  3. 3.A water tank holds 1900 litres. 30% of the water is used. How many litres are left?
  4. 4.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  5. 5.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹220 to ₹330. By what percent did it go up?
  7. 7.A town has 1720 people. Its population grows by 5%. How many people live there now?
  8. 8.A town has 2560 people. Its population grows by 5%. How many people live there now?
  9. 9.The price of a school bag changes from ₹1520 to ₹2128. By what percent did it go up?
  10. 10.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  11. 11.The price of a bicycle is ₹2540. It goes up by 15%. What is the new price (in ₹)?
  12. 12.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  13. 13.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  14. 14.A shop sells 4300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  15. 15.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  16. 16.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  17. 17.A town has 3080 people. Its population grows by 10%. How many people live there now?
  18. 18.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹340 to ₹357. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹3520 to ₹4928. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹2040 to ₹2652. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹4980 to ₹7470. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹960 to ₹1104. By what percent did it go up?
  24. 24.A water tank holds 1140 litres. 40% of the water is used. How many litres are left?
  25. 25.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹4080. It goes up by 10%. What is the new price (in ₹)?
  27. 27.A shop sells 4880 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  28. 28.A shop sells 4780 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  29. 29.A shop sells 1900 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  30. 30.A town has 1500 people. Its population grows by 50%. How many people live there now?
  31. 31.A water tank holds 4900 litres. 40% of the water is used. How many litres are left?
  32. 32.A water tank holds 2420 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹4480 to ₹5600. By what percent did it go up?
  34. 34.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  35. 35.A water tank holds 260 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹560 to ₹336. By what percent did it come down?
  37. 37.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  38. 38.A town has 2180 people. Its population grows by 5%. How many people live there now?
  39. 39.A water tank holds 1940 litres. 15% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹1540. It goes up by 15%. What is the new price (in ₹)?

Answer key

  1. 62.5
  2. 25
  3. 1330
  4. 57.5
  5. 28
  6. 50
  7. 1806
  8. 2688
  9. 40
  10. 28.75
  11. 2921
  12. 28
  13. 38
  14. 5160
  15. 24
  16. 87.5
  17. 3388
  18. 43
  19. 5
  20. 40
  21. 30
  22. 50
  23. 15
  24. 684
  25. 47
  26. 4488
  27. 5124
  28. 5497
  29. 2850
  30. 2250
  31. 2940
  32. 2057
  33. 25
  34. 38
  35. 247
  36. 40
  37. 4
  38. 2289
  39. 1649
  40. 1771

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